SRWare.net

Some users have problems to set Iron as Default Browser on systems with limited rights. Therefore we made a little tool, which runs this job for you automatically. It will be integrated in further releases.

Tutorial:
1.) Download http://www.srware.net/downloads/Iron_Backup_Config.zip, extract it and copy the file to your Iron-Folder (important)
2.) Run it and press GO. Finnished!

Any decision for Linux?

That would be nice to have a solution for Linux, especially Ubuntu

https://launchpad.net/~ikoinoba/+archive/ppa Unofficial Ubuntu repository with "repacked" Iron. Supports setting as default perfectly. I, personally, use it even in Debian.

Replaced by Iron Config & Backup Tool ( http://www.srware.net/forum/viewtopic.php?f=27&t=8768 )